/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.xerces.parsers;

import org.apache.xerces.impl.Constants;
import org.apache.xerces.util.SymbolTable;
import org.apache.xerces.xpointer.XPointerHandler;
import org.apache.xerces.xinclude.XIncludeHandler;
import org.apache.xerces.xinclude.XIncludeNamespaceSupport;
import org.apache.xerces.xni.XMLDocumentHandler;
import org.apache.xerces.xni.grammars.XMLGrammarPool;
import org.apache.xerces.xni.parser.XMLComponentManager;
import org.apache.xerces.xni.parser.XMLConfigurationException;
import org.apache.xerces.xni.parser.XMLDocumentSource;

/**
 * This parser configuration includes an <code>XPointerHandler</code> in the pipeline
 * before the schema validator, or as the last component in the pipeline if there is
 * no schema validator.  Using this pipeline will enable processing according to the
 * XML Inclusions specification with XPointers, to the conformance level described in
 * <code>XPointerHandler.</code>.
 * 
 * @see org.apache.xerces.xpointer.XPointerHandler
 */
public class XPointerParserConfiguration extends XML11Configuration {

    private XPointerHandler fXPointerHandler;
    
    private XIncludeHandler fXIncludeHandler;

    /** Feature identifier: allow notation and unparsed entity events to be sent out of order. */
    protected static final String ALLOW_UE_AND_NOTATION_EVENTS =
        Constants.SAX_FEATURE_PREFIX + Constants.ALLOW_DTD_EVENTS_AFTER_ENDDTD_FEATURE;
    
    /** Feature identifier: fixup base URIs. */
    protected static final String XINCLUDE_FIXUP_BASE_URIS =
        Constants.XERCES_FEATURE_PREFIX + Constants.XINCLUDE_FIXUP_BASE_URIS_FEATURE;
    
    /** Feature identifier: fixup language. */
    protected static final String XINCLUDE_FIXUP_LANGUAGE =
        Constants.XERCES_FEATURE_PREFIX + Constants.XINCLUDE_FIXUP_LANGUAGE_FEATURE;

    /** Property identifier: error reporter. */
    protected static final String XPOINTER_HANDLER =
        Constants.XERCES_PROPERTY_PREFIX + Constants.XPOINTER_HANDLER_PROPERTY;

    /** Property identifier: error reporter. */
    protected static final String XINCLUDE_HANDLER =
        Constants.XERCES_PROPERTY_PREFIX + Constants.XINCLUDE_HANDLER_PROPERTY;
    
    /** Property identifier: error reporter. */
    protected static final String NAMESPACE_CONTEXT =
        Constants.XERCES_PROPERTY_PREFIX + Constants.NAMESPACE_CONTEXT_PROPERTY;

    /** Default constructor. */
    public XPointerParserConfiguration() {
        this(null, null, null);
    } // <init>()

    /** 
     * Constructs a parser configuration using the specified symbol table. 
     *
     * @param symbolTable The symbol table to use.
     */
    public XPointerParserConfiguration(SymbolTable symbolTable) {
        this(symbolTable, null, null);
    } // <init>(SymbolTable)

    /**
     * Constructs a parser configuration using the specified symbol table and
     * grammar pool.
     * <p>
     *
     * @param symbolTable The symbol table to use.
     * @param grammarPool The grammar pool to use.
     */
    public XPointerParserConfiguration(
        SymbolTable symbolTable,
        XMLGrammarPool grammarPool) {
        this(symbolTable, grammarPool, null);
    } // <init>(SymbolTable,XMLGrammarPool)

    /**
     * Constructs a parser configuration using the specified symbol table,
     * grammar pool, and parent settings.
     * <p>
     *
     * @param symbolTable    The symbol table to use.
     * @param grammarPool    The grammar pool to use.
     * @param parentSettings The parent settings.
     */
    public XPointerParserConfiguration(
        SymbolTable symbolTable,
        XMLGrammarPool grammarPool,
        XMLComponentManager parentSettings) {
        super(symbolTable, grammarPool, parentSettings);

        fXIncludeHandler = new XIncludeHandler();
        addCommonComponent(fXIncludeHandler);
        
        fXPointerHandler = new XPointerHandler();
        addCommonComponent(fXPointerHandler);
        
        final String[] recognizedFeatures = {
            ALLOW_UE_AND_NOTATION_EVENTS,
            XINCLUDE_FIXUP_BASE_URIS,
            XINCLUDE_FIXUP_LANGUAGE
        };
        addRecognizedFeatures(recognizedFeatures);

        // add default recognized properties
        final String[] recognizedProperties =
            { XINCLUDE_HANDLER, XPOINTER_HANDLER, NAMESPACE_CONTEXT };
        addRecognizedProperties(recognizedProperties);
        
        setFeature(ALLOW_UE_AND_NOTATION_EVENTS, true);
        setFeature(XINCLUDE_FIXUP_BASE_URIS, true);
        setFeature(XINCLUDE_FIXUP_LANGUAGE, true);
        
        setProperty(XINCLUDE_HANDLER, fXIncludeHandler);
        setProperty(XPOINTER_HANDLER, fXPointerHandler);
        setProperty(NAMESPACE_CONTEXT, new XIncludeNamespaceSupport());
        
            
    } // <init>(SymbolTable,XMLGrammarPool)}
    
    
	/** Configures the pipeline. */
    protected void configurePipeline() {
        super.configurePipeline();

        //configure DTD pipeline
        fDTDScanner.setDTDHandler(fDTDProcessor);
        fDTDProcessor.setDTDSource(fDTDScanner);

        fDTDProcessor.setDTDHandler(fXIncludeHandler);
        fXIncludeHandler.setDTDSource(fDTDProcessor);
        fXIncludeHandler.setDTDHandler(fXPointerHandler);
        fXPointerHandler.setDTDSource(fXIncludeHandler);
        fXPointerHandler.setDTDHandler(fDTDHandler);
        if (fDTDHandler != null) {
            fDTDHandler.setDTDSource(fXPointerHandler);
        }
        
        // configure XML document pipeline: insert after DTDValidator and 
        // before XML Schema validator
        XMLDocumentSource prev = null;
        if (fFeatures.get(XMLSCHEMA_VALIDATION) == Boolean.TRUE) {
            // we don't have to worry about fSchemaValidator being null, since
            // super.configurePipeline() instantiated it if the feature was set
            prev = fSchemaValidator.getDocumentSource();
        }
        // Otherwise, insert after the last component in the pipeline
        else {
            prev = fLastComponent;
            fLastComponent = fXPointerHandler;
        }

        XMLDocumentHandler next = prev.getDocumentHandler();
		prev.setDocumentHandler(fXIncludeHandler);
		fXIncludeHandler.setDocumentSource(prev);

		if (next != null) {
			fXIncludeHandler.setDocumentHandler(next);
            next.setDocumentSource(fXIncludeHandler);
        }

		fXIncludeHandler.setDocumentHandler(fXPointerHandler);
		fXPointerHandler.setDocumentSource(fXIncludeHandler);
    } // configurePipeline()

	protected void configureXML11Pipeline() {
		super.configureXML11Pipeline();
	
        // configure XML 1.1. DTD pipeline
		fXML11DTDScanner.setDTDHandler(fXML11DTDProcessor);
		fXML11DTDProcessor.setDTDSource(fXML11DTDScanner);
		
        fDTDProcessor.setDTDHandler(fXIncludeHandler);
        fXIncludeHandler.setDTDSource(fXML11DTDProcessor);
        fXIncludeHandler.setDTDHandler(fXPointerHandler);
        fXPointerHandler.setDTDSource(fXIncludeHandler);
        fXPointerHandler.setDTDHandler(fDTDHandler);
        if (fDTDHandler != null) {
            fDTDHandler.setDTDSource(fXPointerHandler);
        }

		
		// configure XML document pipeline: insert after DTDValidator and 
		// before XML Schema validator
		XMLDocumentSource prev = null;
		if (fFeatures.get(XMLSCHEMA_VALIDATION) == Boolean.TRUE) {
			// we don't have to worry about fSchemaValidator being null, since
			// super.configurePipeline() instantiated it if the feature was set
			prev = fSchemaValidator.getDocumentSource();
		}
		// Otherwise, insert after the last component in the pipeline
		else {
			prev = fLastComponent;
			fLastComponent = fXPointerHandler;
		}

        XMLDocumentHandler next = prev.getDocumentHandler();
		prev.setDocumentHandler(fXIncludeHandler);
		fXIncludeHandler.setDocumentSource(prev);

		if (next != null) {
			fXIncludeHandler.setDocumentHandler(next);
            next.setDocumentSource(fXIncludeHandler);
        }
		
		fXIncludeHandler.setDocumentHandler(fXPointerHandler);
		fXPointerHandler.setDocumentSource(fXIncludeHandler);

		
	} // configureXML11Pipeline()
    
    public void setProperty(String propertyId, Object value)
        throws XMLConfigurationException {

        //if (propertyId.equals(XINCLUDE_HANDLER)) {
        //}

        super.setProperty(propertyId, value);
    } // setProperty(String,Object)
}